PDF malware analysis — malicious · a93d23da271a967b

MALICIOUS

PDF

4.4 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe

MD5: 2f2dc1aecd46dbb95da779b7c3c3ba0a SHA-1: 19a53dba25164d749fde9ce1b3ce93ac5d16137b SHA-256: a93d23da271a967b6f883abf02997b4d76c767733c0d0050bdcbdd5a248ce8a7

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659 through embedded JavaScript. An extracted artifact, legacy_pdfkit_stage_000.js, was flagged by ClamAV as Js.Exploit.Shellcode-18. This suggests the PDF is designed to leverage these vulnerabilities to execute malicious JavaScript, which in turn likely downloads and executes a second-stage payload.

Heuristics 7

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `0253116c4624140456021d47554b0cc855625c631a92bed11e2a8bace17124ac`	pdf-javascript-stream	PDF /JS object 6 at offset 0xC0A	179 bytes
`javascript_obj0016_001.js` `65726ce75642cbf3a8f235f97e37abe8cf292c84ec623f672afac8adeb3ef0d9`	pdf-javascript-stream	PDF /JS object 16 at offset 0xCDA	490 bytes
`javascript_obj0026_002.js` `45387f24b00673ffeaa728d47b0ca13f680151bef0190febfafdd73b0d19e11c`	pdf-javascript-stream	PDF /JS object 26 at offset 0xE55	141 bytes
`legacy_pdfkit_stage_000.js` `40c05959ec558c7ce951298d4c30495c0557b41791f8f4c875852d6b2b731571`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1BB	6405 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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